paper

Anomalies and gauging of U(1) symmetries

arXiv:2401.10165 · doi:10.1103/PhysRevB.111.024110

Abstract

We propose the Symmetry TFT for theories with a symmetry in arbitrary dimension. The Symmetry TFT describes the structure of the symmetry, its anomalies, and the possible topological manipulations. It is constructed as a BF theory of gauge fields for groups and , and contains a continuum of topological operators. We also propose an operation that produces the Symmetry TFT for the theory obtained by dynamically gauging the symmetry. We discuss many examples. As an interesting outcome, we obtain the Symmetry TFT for the non-invertible chiral symmetry in four dimensions.

Two columns, 12 pages. v2: refs added, more clear exposition. v3: refs added, typos corrected. v4: discussion added to sec. 3.A, matches published version

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